Решите уравнение и сделайте проверку
1) -2*(х-1)+3х=7
2) 5у-(3-у)+(2у-1)=у+3
3)2*(х-5)-3*(х+4)=х-22
1) -2*(х-1)+3х=7
2) 5у-(3-у)+(2у-1)=у+3
3)2*(х-5)-3*(х+4)=х-22
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Answers & Comments
1) -2(x-1)+3x=7
-2x+2+3x=7
X+2=7
X=5
Проверка
-2(5-1)+3*5=7
-8+15=7
7=7
2)5y-(3-y)+(2y-1)=y+3
4y-3+2y-1=y+3
6y-4=y+3
7y=7
Y=1
Проверка
5*1-(3-1)+(2*1-1)=1+3
5-2+1=4
3+1=4
4=4
3)2(x-5)-3(x+4)=x-22
2x-10-3x-12=x-22
x-22=x-22
x=0
проверка
2(0-5)-3(0+4)=0-22
-10-12=-22
-22=-22